libvdpau: cannot open shared object

libvdpau: cannot open shared object

[Marco van Hulten]

Hi,

I am having a problem with kodi, which I installed on a clean
install of GuixSD 0.14.0 on amd64.  It was looking for libvdpau, so I
installed it.  Hereafter I get this:

    kodi@watson ~$ vdpauinfo 
    display: :0.0   screen: 0
    Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared
    object Error creating VDPAU device: 1

Running `kodi` gives the same error.  The VDPAU problem seems like
something that I should solve first, before continuing with kodi.

Thanks,

—Marco

Re: libvdpau: cannot open shared object

[ng0]

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For what it's worth: I've been having crashes with Kodi
for months now. Now back on a new system (installed from
my dev branch that is a couple of commits ahead of guix master)
I get a Kodi that has no visible font characters (even with
fonts installed in my profile, and rebooting + fc-cache -vf run)
and an vdpau / nouveau error message on startup.

Were you able to start Kodi before without issues?
Marco van Hulten transcribed 0.5K bytes:
> Hi,
> 
> I am having a problem with kodi, which I installed on a clean
> install of GuixSD 0.14.0 on amd64.  It was looking for libvdpau, so I
> installed it.  Hereafter I get this:
> 
>     kodi@watson ~$ vdpauinfo 
>     display: :0.0   screen: 0
>     Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared
>     object Error creating VDPAU device: 1
> 
> Running `kodi` gives the same error.  The VDPAU problem seems like
> something that I should solve first, before continuing with kodi.
> 
> Thanks,
> 
> —Marco
> 
> 

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Re: libvdpau: cannot open shared object

[Marco van Hulten]

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ng0—

Je 10 dec 14:30 skribis ng0:
> For what it's worth: I've been having crashes with Kodi
> for months now.

This is worth something: we can now share the pain :-)

> Now back on a new system (installed from
> my dev branch that is a couple of commits ahead of guix master)
> I get a Kodi that has no visible font characters (even with
> fonts installed in my profile, and rebooting + fc-cache -vf run)
> and an vdpau / nouveau error message on startup.

I am using the "intel" X11 module, so it does not appear to be related
to which video card one uses.

> Were you able to start Kodi before without issues?

About a month ago, I could start Kodi without issues, on the same
hardware on GuixSD 0.13.0.  When I then rolled back to the working
version, I could run kodi again.  After some more testing, rolling back
did not help anymore: kodi kept crashing.  I documented it in a thread
on this mailinglist about two weeks ago.

Yesterday I did a clean install of GuixSD 0.14.0.  Ludo' had pointed out
that reinstalling the system is not useful, but I tried anyway when
0.14.0 came out (partly because of the inconsistent roll-back
behaviour).  I think I still have the same problems (at least for the
VDPAU error).

—Marco

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Re: libvdpau: cannot open shared object

[Efraim Flashner]

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On Sun, Dec 10, 2017 at 03:14:53PM +0100, Marco van Hulten wrote:
> Hi,
> 
> I am having a problem with kodi, which I installed on a clean
> install of GuixSD 0.14.0 on amd64.  It was looking for libvdpau, so I
> installed it.  Hereafter I get this:
> 
>     kodi@watson ~$ vdpauinfo 
>     display: :0.0   screen: 0
>     Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared
>     object Error creating VDPAU device: 1
> 
> Running `kodi` gives the same error.  The VDPAU problem seems like
> something that I should solve first, before continuing with kodi.
> 
> Thanks,
> 
> —Marco
> 

I just want to add that I ran:
'guix environment --ad-hoc vdpauinfo -- vdpauinfo'
on my x86_64 GuixSD machine and I got the following:

display: :0.0   screen: 0
Failed to open VDPAU backend libvdpau_i965.so: cannot open shared object file: No such file or directory
Error creating VDPAU device: 1

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Re: libvdpau: cannot open shared object

[Ludovic Courtès]

Hi!

Efraim Flashner <efraim@flashner.co.il> skribis:

> I just want to add that I ran:
> 'guix environment --ad-hoc vdpauinfo -- vdpauinfo'
> on my x86_64 GuixSD machine and I got the following:
>
> display: :0.0   screen: 0
> Failed to open VDPAU backend libvdpau_i965.so: cannot open shared object file: No such file or directory
> Error creating VDPAU device: 1

Same here.

I searched for “libvdpau_i965.so” on the intertubes and it seems to be a
problem “everyone has.”  For instance:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869815

So it seems that we lack a driver package.

Ludo’.

Re: libvdpau: cannot open shared object

[Efraim Flashner]

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On Tue, Dec 12, 2017 at 05:44:43PM +0100, Ludovic Courtès wrote:
> Hi!
> 
> Efraim Flashner <efraim@flashner.co.il> skribis:
> 
> > I just want to add that I ran:
> > 'guix environment --ad-hoc vdpauinfo -- vdpauinfo'
> > on my x86_64 GuixSD machine and I got the following:
> >
> > display: :0.0   screen: 0
> > Failed to open VDPAU backend libvdpau_i965.so: cannot open shared object file: No such file or directory
> > Error creating VDPAU device: 1
> 
> Same here.
> 
> I searched for “libvdpau_i965.so” on the intertubes and it seems to be a
> problem “everyone has.”  For instance:
> 
>   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869815
> 
> So it seems that we lack a driver package.
> 
> Ludo’.

here's a patch for libvdpau-va-gl. after setting 'VDPAU_DRIVER=va_gl'
and running 'guix environment --ad-hoc libvdpau-va-gl vdpauinfo -- vdpauinfo'
I get:
display: :0.0   screen: 0
Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
Error creating VDPAU device: 1
so it still needs some more work

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From da659401a0116d0810f003769c933253f5b18f4c Mon Sep 17 00:00:00 2001
From: Efraim Flashner <efraim@flashner.co.il>
Date: Tue, 12 Dec 2017 21:44:49 +0200
Subject: [PATCH] gnu: Add libvdpau-va-gl.

* gnu/packages/video.scm (libvdpau-va-gl): New variable.
* gnu/packages/patches/libvdpau-va-gl-unbundle.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
---
 gnu/local.mk                                       |  1 +
 gnu/packages/patches/libvdpau-va-gl-unbundle.patch | 35 ++++++++++++++++++++++
 gnu/packages/video.scm                             | 35 ++++++++++++++++++++++
 3 files changed, 71 insertions(+)
 create mode 100644 gnu/packages/patches/libvdpau-va-gl-unbundle.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 46829756b..2cfd35cd8 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -834,6 +834,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libunistring-gnulib-multi-core.patch	\
   %D%/packages/patches/libusb-0.1-disable-tests.patch		\
   %D%/packages/patches/libusb-for-axoloti.patch			\
+  %D%/packages/patches/libvdpau-va-gl-unbundle.patch		\
   %D%/packages/patches/libvpx-CVE-2016-2818.patch		\
   %D%/packages/patches/libxcb-python-3.5-compat.patch		\
   %D%/packages/patches/libxml2-CVE-2016-4658.patch		\
diff --git a/gnu/packages/patches/libvdpau-va-gl-unbundle.patch b/gnu/packages/patches/libvdpau-va-gl-unbundle.patch
new file mode 100644
index 000000000..b15e15c2a
--- /dev/null
+++ b/gnu/packages/patches/libvdpau-va-gl-unbundle.patch
@@ -0,0 +1,35 @@
+From 18e3ff648356cf06a39372aa4a4bbf2732d9d0f4 Mon Sep 17 00:00:00 2001
+From: Efraim Flashner <efraim@flashner.co.il>
+Date: Tue, 12 Dec 2017 21:36:44 +0200
+Subject: [PATCH] don't use bundled libvdpau headers
+
+---
+ CMakeLists.txt | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 0484179..e950707 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -9,16 +9,17 @@ find_package(PkgConfig REQUIRED)
+ find_package(X11 REQUIRED)
+ pkg_check_modules(LIBVA      libva-x11  REQUIRED)
+ pkg_check_modules(LIBGL      gl         REQUIRED)
++pkg_check_modules(LIBVDPAU   vdpau      REQUIRED)
+ 
+ set(DRIVER_NAME "vdpau_va_gl" CACHE STRING "driver name")
+ set(LIB_SUFFIX "" CACHE STRING "library path suffix (if needed)")
+ set(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}/vdpau" CACHE PATH "library installation path")
+ 
+ include_directories (
+-    3rdparty
+     ${X11_INCLUDE_DIRS}
+     ${LIBVA_INCLUDE_DIRS}
+     ${LIBGL_INCLUDE_DIRS}
++    ${LIBVDPAU_INCLUDE_DIRS}
+     ${GENERATED_INCLUDE_DIRS}
+     ${CMAKE_BINARY_DIR}
+ )
+-- 
+2.15.1
+
diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index 0bd1be6e6..d8f8081fe 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -1864,6 +1864,41 @@ present in modern GPUs.")
 implementation.")
     (license (license:x11-style "file://COPYING"))))
 
+(define-public libvdpau-va-gl
+  (package
+    (name "libvdpau-va-gl")
+    (version "0.4.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append "https://github.com/i-rinat/libvdpau-va-gl/"
+                            "releases/download/v" version "/libvdpau-va-gl-"
+                            version ".tar.gz"))
+        (sha256
+         (base32
+          "1x2ag1f2fwa4yh1g5spv99w9x1m33hbxlqwyhm205ssq0ra234bx"))
+        (patches (search-patches "libvdpau-va-gl-unbundle.patch"))
+        (modules '((guix build utils)))
+        (snippet '(delete-file-recursively "3rdparty"))))
+    (build-system cmake-build-system)
+    (arguments
+     '(#:tests? #f)) ; Tests require a running X11 server, with VA-API support.
+    (native-inputs
+     `(("libvdpau" ,libvdpau)
+       ("pkg-config" ,pkg-config)))
+    (inputs
+     `(("libva" ,libva)
+       ("mesa" ,mesa)))
+    (home-page "https://github.com/i-rinat/libvdpau-va-gl")
+    (synopsis "VDPAU driver with VA-API/OpenGL backend")
+    (description
+     "Many applications can use VDPAU to accelerate portions of the video
+decoding process and video post-processing to the GPU video hardware.  Since
+there is no VDPAU available on Intel chips, they fall back to different drawing
+techniques.  This driver uses OpenGL under the hood to accelerate drawing and
+scaling and VA-API (if available) to accelerate video decoding.")
+    (license license:expat)))
+
 (define-public recordmydesktop
   (package
     (name "recordmydesktop")
-- 
2.15.1


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Re: libvdpau: cannot open shared object

[Ludovic Courtès]

Hi!

Efraim Flashner <efraim@flashner.co.il> skribis:

> On Tue, Dec 12, 2017 at 05:44:43PM +0100, Ludovic Courtès wrote:

[...]

>> I searched for “libvdpau_i965.so” on the intertubes and it seems to be a
>> problem “everyone has.”  For instance:
>> 
>>   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869815
>> 
>> So it seems that we lack a driver package.
>> 
>> Ludo’.
>
> here's a patch for libvdpau-va-gl. after setting 'VDPAU_DRIVER=va_gl'
> and running 'guix environment --ad-hoc libvdpau-va-gl vdpauinfo -- vdpauinfo'
> I get:
> display: :0.0   screen: 0
> Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
> Error creating VDPAU device: 1
> so it still needs some more work

What if you point LD_LIBRARY_PATH to libvdpau-va-gl?

> From da659401a0116d0810f003769c933253f5b18f4c Mon Sep 17 00:00:00 2001
> From: Efraim Flashner <efraim@flashner.co.il>
> Date: Tue, 12 Dec 2017 21:44:49 +0200
> Subject: [PATCH] gnu: Add libvdpau-va-gl.
>
> * gnu/packages/video.scm (libvdpau-va-gl): New variable.
> * gnu/packages/patches/libvdpau-va-gl-unbundle.patch: New file.
> * gnu/local.mk (dist_patch_DATA): Register it.

[...]

> +    (native-inputs
> +     `(("libvdpau" ,libvdpau)

Should move to ‘inputs’ I guess?

Otherwise LGTM, thanks for acting this fast!

When we have that, we can at least arrange for things to work
out-of-the-box on GuixSD.  It’s better if we can do that without setting
LD_LIBRARY_PATH, we’ll have to investigate how this can be done.  At
least, we’ll have to set VDPAU_DRIVER=va_gl I presume?

Thanks,
Ludo’.

Re: libvdpau: cannot open shared object

[Efraim Flashner]

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On Thu, Dec 14, 2017 at 10:07:20AM +0100, Ludovic Courtès wrote:
> Hi!
> 
> Efraim Flashner <efraim@flashner.co.il> skribis:
> 
> > On Tue, Dec 12, 2017 at 05:44:43PM +0100, Ludovic Courtès wrote:
> 
> [...]
> 
> >> I searched for “libvdpau_i965.so” on the intertubes and it seems to be a
> >> problem “everyone has.”  For instance:
> >> 
> >>   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869815
> >> 
> >> So it seems that we lack a driver package.
> >> 
> >> Ludo’.
> >
> > here's a patch for libvdpau-va-gl. after setting 'VDPAU_DRIVER=va_gl'
> > and running 'guix environment --ad-hoc libvdpau-va-gl vdpauinfo -- vdpauinfo'
> > I get:
> > display: :0.0   screen: 0
> > Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
> > Error creating VDPAU device: 1
> > so it still needs some more work
> 
> What if you point LD_LIBRARY_PATH to libvdpau-va-gl?
> 
> > From da659401a0116d0810f003769c933253f5b18f4c Mon Sep 17 00:00:00 2001
> > From: Efraim Flashner <efraim@flashner.co.il>
> > Date: Tue, 12 Dec 2017 21:44:49 +0200
> > Subject: [PATCH] gnu: Add libvdpau-va-gl.
> >
> > * gnu/packages/video.scm (libvdpau-va-gl): New variable.
> > * gnu/packages/patches/libvdpau-va-gl-unbundle.patch: New file.
> > * gnu/local.mk (dist_patch_DATA): Register it.
> 
> [...]
> 
> > +    (native-inputs
> > +     `(("libvdpau" ,libvdpau)
> 
> Should move to ‘inputs’ I guess?
> 
> Otherwise LGTM, thanks for acting this fast!

$ guix gc --references $(guix build libvdpau-va-gl)
/gnu/store/1zfmi6bixxz3fljr4kfy37xpjial90p1-libva-1.8.3
/gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25
/gnu/store/6wyjls0q2c9gjskkplsr1ad09p3d8gzg-gcc-5.4.0-lib
/gnu/store/7mdyg1vigcxqb1ra16mdqnhz8aa00xc7-libxext-1.3.3
/gnu/store/8z7130mb33a3jqliqs6bq2d46mar5gqy-mesa-17.2.1
/gnu/store/d3pbj6vynkig0v0lnwp9nh04sijxin2w-libvdpau-va-gl-0.4.2
/gnu/store/p37m873k9k69m944njar80i6bsmqrcvj-libx11-1.6.5

libvdpau is actually a propagated input of mesa

> 
> When we have that, we can at least arrange for things to work
> out-of-the-box on GuixSD.  It’s better if we can do that without setting
> LD_LIBRARY_PATH, we’ll have to investigate how this can be done.  At
> least, we’ll have to set VDPAU_DRIVER=va_gl I presume?
> 
> Thanks,
> Ludo’.

From the upstream documentation VDPAU_DRIVER=va_gl is the minimum needed
to get it working, and then there are a couple of other environmental
variables that can be set to change its behavior.

$ VDPAU_DRIVER=va_gl LD_LIBRARY_PRELOAD=$(guix build libvdpau-va-gl) env | grep VDPAU
VDPAU_DRIVER=va_gl

$ VDPAU_DRIVER=va_gl LD_LIBRARY_PRELOAD=$(guix build libvdpau-va-gl) vdpauinfo
display: :0.0   screen: 0
Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
Error creating VDPAU device: 1

Not so helpful to us, but upstream wants us to install it in the same
directory as the other vdpau*so files. I suppose we could add a
mesa-headers package and use that to build it and then just copy it into
mesa-out/lib/vdpau, but I really don't like that idea. I'm inclined to
push it as is and then we'll work out exactly how to make it work for
us.

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Re: libvdpau: cannot open shared object

[Ludovic Courtès]

Efraim Flashner <efraim@flashner.co.il> skribis:

> On Thu, Dec 14, 2017 at 10:07:20AM +0100, Ludovic Courtès wrote:

[...]

>> > From da659401a0116d0810f003769c933253f5b18f4c Mon Sep 17 00:00:00 2001
>> > From: Efraim Flashner <efraim@flashner.co.il>
>> > Date: Tue, 12 Dec 2017 21:44:49 +0200
>> > Subject: [PATCH] gnu: Add libvdpau-va-gl.
>> >
>> > * gnu/packages/video.scm (libvdpau-va-gl): New variable.
>> > * gnu/packages/patches/libvdpau-va-gl-unbundle.patch: New file.
>> > * gnu/local.mk (dist_patch_DATA): Register it.
>> 
>> [...]
>> 
>> > +    (native-inputs
>> > +     `(("libvdpau" ,libvdpau)
>> 
>> Should move to ‘inputs’ I guess?
>> 
>> Otherwise LGTM, thanks for acting this fast!
>
> $ guix gc --references $(guix build libvdpau-va-gl)
> /gnu/store/1zfmi6bixxz3fljr4kfy37xpjial90p1-libva-1.8.3
> /gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25
> /gnu/store/6wyjls0q2c9gjskkplsr1ad09p3d8gzg-gcc-5.4.0-lib
> /gnu/store/7mdyg1vigcxqb1ra16mdqnhz8aa00xc7-libxext-1.3.3
> /gnu/store/8z7130mb33a3jqliqs6bq2d46mar5gqy-mesa-17.2.1
> /gnu/store/d3pbj6vynkig0v0lnwp9nh04sijxin2w-libvdpau-va-gl-0.4.2
> /gnu/store/p37m873k9k69m944njar80i6bsmqrcvj-libx11-1.6.5
>
> libvdpau is actually a propagated input of mesa

OK.

>> When we have that, we can at least arrange for things to work
>> out-of-the-box on GuixSD.  It’s better if we can do that without setting
>> LD_LIBRARY_PATH, we’ll have to investigate how this can be done.  At
>> least, we’ll have to set VDPAU_DRIVER=va_gl I presume?
>> 
>> Thanks,
>> Ludo’.
>
> From the upstream documentation VDPAU_DRIVER=va_gl is the minimum needed
> to get it working, and then there are a couple of other environmental
> variables that can be set to change its behavior.
>
> $ VDPAU_DRIVER=va_gl LD_LIBRARY_PRELOAD=$(guix build libvdpau-va-gl) env | grep VDPAU
> VDPAU_DRIVER=va_gl
>
> $ VDPAU_DRIVER=va_gl LD_LIBRARY_PRELOAD=$(guix build libvdpau-va-gl) vdpauinfo
> display: :0.0   screen: 0
> Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
> Error creating VDPAU device: 1

It should be:

  LD_LIBRARY_PATH=$(guix build libvdpau-va-gl)/lib

or:

  LD_PRELOAD=$(guix build libvdpau-va-gl)/lib/libwhatever-its-called.so

HTH!

Ludo’.

Re: libvdpau: cannot open shared object

[Efraim Flashner]

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On Fri, Dec 15, 2017 at 12:02:14PM +0100, Ludovic Courtès wrote:
> 
> It should be:
> 
>   LD_LIBRARY_PATH=$(guix build libvdpau-va-gl)/lib

$ VDPAU_DRIVER=va_gl LD_LIBRARY_PATH=$(guix build libvdpau-va-gl)/lib vdpauinfo
display: :0.0   screen: 0
Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
Error creating VDPAU device: 1

> 
> or:
> 
>   LD_PRELOAD=$(guix build libvdpau-va-gl)/lib/libwhatever-its-called.so

$ VDPAU_DRIVER=va_gl LD_PRELOAD=$(guix build libvdpau-va-gl)/lib/vdpau/libvdpau_va_gl.so vdpauinfo
display: :0.0   screen: 0
Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
Error creating VDPAU device: 1

> 
> HTH!
> 
> Ludo’.

Not sure what's going on with this one :/

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Re: libvdpau: cannot open shared object

[Ludovic Courtès]

Efraim Flashner <efraim@flashner.co.il> skribis:

> $ VDPAU_DRIVER=va_gl LD_LIBRARY_PATH=$(guix build libvdpau-va-gl)/lib vdpauinfo
> display: :0.0   screen: 0
> Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
> Error creating VDPAU device: 1

Well the exact line is this:

  VDPAU_DRIVER=va_gl \
  LD_LIBRARY_PATH=$(./pre-inst-env guix build libvdpau-va-gl)/lib/vdpau \
  $(guix build vdpauinfo)/bin/vdpauinfo

Works for me!  It displays lots of things.  :-)

So I think you can push the package, and then we need to figure out what
to do on GuixSD with ‘VDPAU_DRIVER’ (set it unconditionally to ‘va_gl’?)
and how to avoid LD_LIBRARY_PATH.

Thanks,
Ludo’.

Re: libvdpau: cannot open shared object

[Marco van Hulten]

Ludovic—

Je 15 dec 15:31 skribis Ludovic:
> Efraim Flashner <efraim@flashner.co.il> skribis:
> 
> > $ VDPAU_DRIVER=va_gl LD_LIBRARY_PATH=$(guix build libvdpau-va-gl)/lib vdpauinfo
> > display: :0.0   screen: 0
> > Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
> > Error creating VDPAU device: 1  
> 
> Well the exact line is this:
> 
>   VDPAU_DRIVER=va_gl \
>   LD_LIBRARY_PATH=$(./pre-inst-env guix build libvdpau-va-gl)/lib/vdpau \
>   $(guix build vdpauinfo)/bin/vdpauinfo
> 
> Works for me!  It displays lots of things.  :-)
> [...]

It does not work for me, still cannot find 'libvdpau_va_gl.so'.
I am trying to understand the commands that you use to define
LD_LIBRARY_PATH:

    kodi@watson ~$ guix build libvdpau-va-gl
    guix build: error: libvdpau-va-gl: unknown package
    kodi@watson ~$ guix build vdpauinfo
    /gnu/store/46x8ba3q11zgq8qygqpgkv41ws9km9b1-vdpauinfo-1.0

Where can I find 'pre-inst-env'?  Does this make guix aware of the
libvdpau-va-gl package?

I'm running GuixSD 0.14.0 on real hardware, and did a pull and upgrade
just yesterday.

—Marco

Re: libvdpau: cannot open shared object

[Ricardo Wurmus]

Hi Marco,

> Ludovic—
>
> Je 15 dec 15:31 skribis Ludovic:
>> Efraim Flashner <efraim@flashner.co.il> skribis:
>>
>> > $ VDPAU_DRIVER=va_gl LD_LIBRARY_PATH=$(guix build libvdpau-va-gl)/lib vdpauinfo
>> > display: :0.0   screen: 0
>> > Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
>> > Error creating VDPAU device: 1
>>
>> Well the exact line is this:
>>
>>   VDPAU_DRIVER=va_gl \
>>   LD_LIBRARY_PATH=$(./pre-inst-env guix build libvdpau-va-gl)/lib/vdpau \
>>   $(guix build vdpauinfo)/bin/vdpauinfo
>>
>> Works for me!  It displays lots of things.  :-)
>> [...]
>
> It does not work for me, still cannot find 'libvdpau_va_gl.so'.
> I am trying to understand the commands that you use to define
> LD_LIBRARY_PATH:
>
>     kodi@watson ~$ guix build libvdpau-va-gl
>     guix build: error: libvdpau-va-gl: unknown package
>     kodi@watson ~$ guix build vdpauinfo
>     /gnu/store/46x8ba3q11zgq8qygqpgkv41ws9km9b1-vdpauinfo-1.0p
>
> Where can I find 'pre-inst-env'?  Does this make guix aware of the
> libvdpau-va-gl package?

“pre-inst-env” is a wrapper script that will be created when building
Guix from a git checkout.  It ensures that the (possibly modified)
source directory is used for all operations.

If you don’t have a source checkout then you won’t have that script as
you don’t have a need for it.

This discussion is about a change that is not yet part of Guix.

--
Ricardo

GPG: BCA6 89B6 3655 3801 C3C6  2150 197A 5888 235F ACAC
https://elephly.net

Re: libvdpau: cannot open shared object

[Efraim Flashner]

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On Fri, Dec 15, 2017 at 03:31:29PM +0100, Ludovic Courtès wrote:
> Efraim Flashner <efraim@flashner.co.il> skribis:
> 
> > $ VDPAU_DRIVER=va_gl LD_LIBRARY_PATH=$(guix build libvdpau-va-gl)/lib vdpauinfo
> > display: :0.0   screen: 0
> > Failed to open VDPAU backend libvdpau_va_gl.so: cannot open shared object file: No such file or directory
> > Error creating VDPAU device: 1
> 
> Well the exact line is this:
> 
>   VDPAU_DRIVER=va_gl \
>   LD_LIBRARY_PATH=$(./pre-inst-env guix build libvdpau-va-gl)/lib/vdpau \
>   $(guix build vdpauinfo)/bin/vdpauinfo
> 
> Works for me!  It displays lots of things.  :-)
> 

It seems I forgot the '/vdpau'

> So I think you can push the package, and then we need to figure out what
> to do on GuixSD with ‘VDPAU_DRIVER’ (set it unconditionally to ‘va_gl’?)
> and how to avoid LD_LIBRARY_PATH.

The VDPAU_DRIVER is actually a mesa environmental variable IIRC, so
setting it unconditionally would negatively affect others.

> 
> Thanks,
> Ludo’.

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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Re: libvdpau: cannot open shared object

[Ludovic Courtès]

Efraim Flashner <efraim@flashner.co.il> skribis:

> On Fri, Dec 15, 2017 at 03:31:29PM +0100, Ludovic Courtès wrote:

[...]

>> So I think you can push the package, and then we need to figure out what
>> to do on GuixSD with ‘VDPAU_DRIVER’ (set it unconditionally to ‘va_gl’?)
>> and how to avoid LD_LIBRARY_PATH.
>
> The VDPAU_DRIVER is actually a mesa environmental variable IIRC, so
> setting it unconditionally would negatively affect others.

How should it be handled?

I’m under the impression that ‘va_gl’ is the generic driver that works
for everyone, but that there might be optimized drivers for specific
pieces of hardware, is that correct?

If it is, we could always use ‘va_gl’ as the default.

As for LD_LIBRARY_PATH, perhaps we need a central location for these
drivers on GuixSD, like /run/current-system/vdpau?

Ludo’.